The marketing on the homepage needs an overhaul. Took me a really long time to understand the product! The automatic code changing at the top was super confusing. Clicking on the demos didn't work. A lot of the demos had locks on them (???), which is weird -- the demos help me understand the product, why would they be locked? More confusing, a lot of the locked demos had been unlocked by sponsors, so clicking on them worked! So why was the lock still there?

Also the tag "more than syntax highlighting" is what threw me off. I thought this would be an IDE extension or something that extended syntax highlighting in some cool way. I thought you were just using markdown as an example. Maybe "supercharged markdown code blocks" might be a better tag line.

That's probably the biggest thing I see as a production-ready blocker. The feature itself looks cool based on the few demos I saw.